//! DataHub 模块
//! 实现与 C# DataHub 对应的核心业务逻辑

use std::collections::HashMap;
use std::sync::Arc;
use tokio::sync::RwLock;

use crate::models::{
    token_model::TokenModel,
    operate_result::OperateResult,
    kernel_request_type::KernelRequest,
    data_source_load_options::DataSourceLoadOptions,
    collect_update_data::CollectUpdateData,
    object_set_data::ObjectSetData,
    bucket_item_data::BucketItemData,
};

use super::message::{HubMessage, HubResponse, MessageType};

/// DataHub - 对应 C# 的 DataHub 类
pub struct DataHub {
    // 连接组管理
    groups: Arc<RwLock<HashMap<String, Vec<Uuid>>>>,
    
    // 内核服务客户端（TODO: 实现内核服务调用）
    kernel_client: Arc<dyn KernelClient>,
}

/// 内核服务客户端 trait
#[async_trait::async_trait]
pub trait KernelClient: Send + Sync {
    /// 发送请求到内核服务
    async fn send_request(&self, request: KernelRequest) -> anyhow::Result<serde_json::Value>;
    
    /// 发送带参数的请求
    async fn send_request_with_args(
        &self, 
        request: KernelRequest, 
        args: serde_json::Value
    ) -> anyhow::Result<serde_json::Value>;
}

/// 模拟内核服务客户端（TODO: 替换为实际实现）
pub struct MockKernelClient;

#[async_trait::async_trait]
impl KernelClient for MockKernelClient {
    async fn send_request(&self, _request: KernelRequest) -> anyhow::Result<serde_json::Value> {
        // 模拟内核服务响应
        Ok(serde_json::json!({
            "success": true,
            "data": {}
        }))
    }
    
    async fn send_request_with_args(
        &self, 
        _request: KernelRequest, 
        _args: serde_json::Value
    ) -> anyhow::Result<serde_json::Value> {
        // 模拟内核服务响应
        Ok(serde_json::json!({
            "success": true,
            "data": {}
        }))
    }
}

impl DataHub {
    pub fn new() -> Self {
        Self {
            groups: Arc::new(RwLock::new(HashMap::new())),
            kernel_client: Arc::new(MockKernelClient) as Arc<dyn KernelClient>,
        }
    }
    
    /// 设置内核服务客户端
    pub fn with_kernel_client(mut self, client: Arc<dyn KernelClient>) -> Self {
        self.kernel_client = client;
        self
    }
    
    /// 处理 Hub 消息
    pub async fn handle_message(
        &self,
        message: HubMessage,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        match message.message_type {
            MessageType::Invocation => {
                if let Some(target) = &message.target {
                    let arguments = message.arguments.unwrap_or_default();
                    
                    match target.as_str() {
                        "TokenAuth" => self.token_auth(arguments, token).await,
                        "ThingLoad" => self.thing_load(arguments, token).await,
                        "ThingInsert" => self.thing_insert(arguments, token).await,
                        "ThingUpdate" => self.thing_update(arguments, token).await,
                        "ThingDelete" => self.thing_delete(arguments, token).await,
                        "CollectionLoad" => self.collection_load(arguments, token).await,
                        "CollectionInsert" => self.collection_insert(arguments, token).await,
                        "CollectionUpdate" => self.collection_update(arguments, token).await,
                        "CollectionDelete" => self.collection_delete(arguments, token).await,
                        "ObjectLoad" => self.object_load(arguments, token).await,
                        "ObjectInsert" => self.object_insert(arguments, token).await,
                        "ObjectUpdate" => self.object_update(arguments, token).await,
                        "ObjectDelete" => self.object_delete(arguments, token).await,
                        "BucketLoad" => self.bucket_load(arguments, token).await,
                        "BucketInsert" => self.bucket_insert(arguments, token).await,
                        "BucketUpdate" => self.bucket_update(arguments, token).await,
                        "BucketDelete" => self.bucket_delete(arguments, token).await,
                        "AddToGroup" => self.add_to_group(arguments, token).await,
                        "RemoveFromGroup" => self.remove_from_group(arguments, token).await,
                        "SendToGroup" => self.send_to_group(arguments, token).await,
                        _ => Err(anyhow::anyhow!("未知方法: {}", target)),
                    }
                } else {
                    Err(anyhow::anyhow!("缺少目标方法"))
                }
            }
            _ => Err(anyhow::anyhow!("不支持的消息类型: {:?}", message.message_type)),
        }
    }
    
    /// Token 认证
    async fn token_auth(
        &self,
        arguments: Vec<serde_json::Value>,
        _token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        if arguments.is_empty() {
            return Err(anyhow::anyhow!("TokenAuth 缺少参数"));
        }
        
        // TODO: 实现实际的 Token 验证逻辑
        let token_data = &arguments[0];
        
        // 模拟认证成功
        let result = OperateResult::success(serde_json::json!({
            "authenticated": true,
            "userId": 1,
            "belongId": 1
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Thing 加载
    async fn thing_load(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        if arguments.is_empty() {
            return Err(anyhow::anyhow!("ThingLoad 缺少参数"));
        }
        
        let options: DataSourceLoadOptions = serde_json::from_value(arguments[0].clone())?;
        
        // TODO: 实现 Thing 加载逻辑
        tracing::info!("ThingLoad: {:?}", options);
        
        let result = OperateResult::success(serde_json::json!({
            "things": [],
            "total": 0
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Thing 插入
    async fn thing_insert(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Thing 插入逻辑
        let result = OperateResult::success(serde_json::json!({
            "id": Uuid::new_v4().to_string()
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Thing 更新
    async fn thing_update(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Thing 更新逻辑
        let result = OperateResult::success(serde_json::json!({
            "updated": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Thing 删除
    async fn thing_delete(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Thing 删除逻辑
        let result = OperateResult::success(serde_json::json!({
            "deleted": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Collection 加载
    async fn collection_load(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        if arguments.is_empty() {
            return Err(anyhow::anyhow!("CollectionLoad 缺少参数"));
        }
        
        let options: DataSourceLoadOptions = serde_json::from_value(arguments[0].clone())?;
        
        // TODO: 实现 Collection 加载逻辑
        tracing::info!("CollectionLoad: {:?}", options);
        
        let result = OperateResult::success(serde_json::json!({
            "collections": [],
            "total": 0
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Collection 插入
    async fn collection_insert(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Collection 插入逻辑
        let result = OperateResult::success(serde_json::json!({
            "id": Uuid::new_v4().to_string()
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Collection 更新
    async fn collection_update(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        if arguments.is_empty() {
            return Err(anyhow::anyhow!("CollectionUpdate 缺少参数"));
        }
        
        let update_data: CollectUpdateData = serde_json::from_value(arguments[0].clone())?;
        
        // TODO: 实现 Collection 更新逻辑
        tracing::info!("CollectionUpdate: {:?}", update_data);
        
        let result = OperateResult::success(serde_json::json!({
            "updated": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Collection 删除
    async fn collection_delete(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Collection 删除逻辑
        let result = OperateResult::success(serde_json::json!({
            "deleted": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Object 加载
    async fn object_load(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Object 加载逻辑
        let result = OperateResult::success(serde_json::json!({
            "objects": [],
            "total": 0
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Object 插入
    async fn object_insert(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        if arguments.is_empty() {
            return Err(anyhow::anyhow!("ObjectInsert 缺少参数"));
        }
        
        let set_data: ObjectSetData = serde_json::from_value(arguments[0].clone())?;
        
        // TODO: 实现 Object 插入逻辑
        tracing::info!("ObjectInsert: {:?}", set_data);
        
        let result = OperateResult::success(serde_json::json!({
            "id": Uuid::new_v4().to_string()
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Object 更新
    async fn object_update(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Object 更新逻辑
        let result = OperateResult::success(serde_json::json!({
            "updated": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Object 删除
    async fn object_delete(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Object 删除逻辑
        let result = OperateResult::success(serde_json::json!({
            "deleted": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Bucket 加载
    async fn bucket_load(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Bucket 加载逻辑
        let result = OperateResult::success(serde_json::json!({
            "buckets": [],
            "total": 0
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Bucket 插入
    async fn bucket_insert(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        if arguments.is_empty() {
            return Err(anyhow::anyhow!("BucketInsert 缺少参数"));
        }
        
        let item_data: BucketItemData = serde_json::from_value(arguments[0].clone())?;
        
        // TODO: 实现 Bucket 插入逻辑
        tracing::info!("BucketInsert: {:?}", item_data);
        
        let result = OperateResult::success(serde_json::json!({
            "id": Uuid::new_v4().to_string()
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Bucket 更新
    async fn bucket_update(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Bucket 更新逻辑
        let result = OperateResult::success(serde_json::json!({
            "updated": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// Bucket 删除
    async fn bucket_delete(
        &self,
        arguments: Vec<serde_json::Value>,
        token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现 Bucket 删除逻辑
        let result = OperateResult::success(serde_json::json!({
            "deleted": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// 添加到组
    async fn add_to_group(
        &self,
        arguments: Vec<serde_json::Value>,
        _token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        if arguments.len() < 2 {
            return Err(anyhow::anyhow!("AddToGroup 缺少参数"));
        }
        
        let group_name = arguments[0].as_str().unwrap_or("");
        let connection_id = arguments[1].as_str().unwrap_or("");
        
        // TODO: 实现添加到组逻辑
        tracing::info!("AddToGroup: {} -> {}", connection_id, group_name);
        
        let result = OperateResult::success(serde_json::json!({
            "added": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// 从组中移除
    async fn remove_from_group(
        &self,
        arguments: Vec<serde_json::Value>,
        _token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现从组中移除逻辑
        let result = OperateResult::success(serde_json::json!({
            "removed": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
    
    /// 发送消息到组
    async fn send_to_group(
        &self,
        arguments: Vec<serde_json::Value>,
        _token: Option<TokenModel>,
    ) -> anyhow::Result<HubResponse> {
        // TODO: 实现发送消息到组逻辑
        let result = OperateResult::success(serde_json::json!({
            "sent": true
        }));
        
        Ok(HubResponse::success(None, serde_json::to_value(result)?))
    }
}

use uuid::Uuid;

#[cfg(test)]
mod tests {
    use super::*;
    
    #[tokio::test]
    async fn test_data_hub_creation() {
        let hub = DataHub::new();
        assert!(true); // 简单的创建测试
    }
}